COXTliXTS. 



PilKC. 



Introduction 7 



Importations of Calosoma beetles from Europe and Japan 8 



MethoiLs of packing predaceous beetles for shipment 9 



European distribution of Calosoma sycophanta and hosts attacked 13 



Plan of work at the laboratory 13 



Investigational work on Calosoma sycophanta 14 



Equipment used for rearing predaceous beetles 15 



Out-door insectary for rearing t'alosoma beetles 18 



Methods of rearing ])redaceous beetles 20 



Investigation of the life history of Calosoina si/eopfunifa 22 



The egg 23 



Notes on hatching 25 



Effect of cold on eggs 26 



The larva 2G 



First-stage larva 26 



Second-stage larva 26 



Third-stage larva 27 



The process of molting 27 



Length of time in larval stages 27 



Time of appearance of the larva 29 



Habits of the larva 29 



Distance traveled by the larva 30 



Feeding habits of the larva 32 



Food of the larva 34 



Experiments in feeding larvic 35 



Amount of food required 35 



Experiments in feeding Calosoma larvio witli diseased gil)sy 



moth caterpillars 36 



Results of feeding to Calosoma larvje caterpillars from s])rayed 



or poisoned areas 37 



Experiments in feeding gipsy moth puptc to Calosoma larvte ... 38 



Experiment in feeding earthworms to larva? of Calosoma 39 



Starvation experiment applied to larvje of Calosoma sycophanta.. . 40 

 Experiment to determine whether Calosoma larv;e will hibernate 



during the winter 41 



Placing Calosoma larv;o in cold storage to determine ability to 



withstand cold 41 



Methods used in rearing ( 'alosoma larva? 41 



The distance Calosoma larvie penetrate the ground to i)iii)ate. ... 44 



The pu])a 45 



The pupal chamber 45 



Description of i)upa 45 



3 



